Method error_with_token

crates/hll-to-ir/src/parser.rs:2327–2332

(&self, message: &str, token: &Token<'a>)

    fn match_lparen(&mut self) -> bool {
        self.match_variant(|t| matches!(t, Token::LParen))
    }

    fn parse_primary(&mut self) -> Result<Expression, ParserError> {
        let expr = match self.peek() {
            Some(Token::Fn) => {
                return Err(self.error(
                    "lambda expressions omit `fn`; write `(name: Type) -> Return { ... }`",
                ));
            }